Equivalent to the phrase "I'm up for it," but abbreviated. It's similar to saying "I'm down." Meaning you're interested in joining in on the activity suggested in conversation.
Awake; stimulated; conscious and responsive to external stimuli.
1. Some reference texts claim that “I'm up” is defined as physically out of bed. This is too specific to be precise. “Im up” (a colloquial shortening of “I'm up for it”) can also mean “Im down with it”. As spacial references, these definitions cannot coexist. Readers who deal with this inconsistency by choosing one definition and politicking for the exclusion of the other are invited to review the urban dictionary entry for “fuck off”.
2. For phrases meaning on one's feet, see: "up and about" or "up and at 'em".
A phrase used to signify to an individual that you are aware of their current level shenanigans and believe that you have surpassed them in your level of shenanigans.
The phrase is best delivered in a condescending vocal tone.
When your wife, kids, or boss are arguing with you and you want to end it. Signaling the conversation is DEFINITELY OVER.
Used frequently by news anchors.